1. Fig. 1. NCEP/NCAR Composite analysis 24 hours prior to event onset (T-24) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

2. Fig. 2. NCEP/NCAR Composite analysis 12 hours prior to event onset (T-12) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

3. Fig. 3. NCEP/NCAR Composite analysis at event onset (T-0) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

4. Fig. 4. NCEP/NCAR Composite analysis 12 hours after event onset (T+12) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

5. Fig. 5. NCEP/NCAR Composite analysis 24 hours after event onset (T+24) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

6. a. d.c. b. Fig. 6. NCEP/NCAR Composite analysis of criteria events for Plymouth, NH 24 hours prior to event onset (T-24) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure.

7. Fig. 7. NCEP/NCAR Composite analysis of non-criteria events for Plymouth, NH 24 hours prior to event onset (T-24) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

8. Fig. 8. NCEP/NCAR Composite analysis of criteria events for Plymouth, NH 12 hours prior to event onset (T-12) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

9. Fig. 9. NCEP/NCAR Composite analysis of non-criteria events for Plymouth, NH 12 hours prior to event onset (T-12) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

10. Fig. 10. NCEP/NCAR Composite analysis of criteria events for Plymouth, NH at event onset (T-0) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

11. Fig. 11. NCEP/NCAR Composite analysis of non-criteria events for Plymouth, NH at event onset (T-0) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

12. Fig. 12. NCEP/NCAR Composite analysis of criteria events for Plymouth, NH 12 hours after event onset (T+12) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

13. Fig. 13. NCEP/NCAR Composite analysis of non-criteria events for Plymouth, NH 12 hours after event onset (T+12) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

14. Fig. 14. NCEP/NCAR Composite analysis of events for Plymouth, NH 12 hours after event onset (T+12) for a) criteria surface temperature, b) non-criteria surface temperature, c) criteria surface vector wind, and d) non-criteria surface vector wind. a. d.c. b.

15. Fig. 15. NCEP/NCAR Composite analysis of criteria events for Plymouth, NH 24 hours after event onset (T+24) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

16. Fig. 16. NCEP/NCAR Composite analysis of non-criteria events for Plymouth, NH 24 hours after event onset (T+24) for a) 250-hPa vector wind, b) 500-hPa geopotential height, c) 850-hPa temperature, and d) sea-level pressure. a. d.c. b.

17. Fig. 17. NCEP/NCAR Composite analysis of events for Plymouth, NH 24 hours after event onset (T+24) for a) criteria surface temperature, b) non-criteria surface temperature, c) criteria surface vector wind, and d) non-criteria surface vector wind. a. d.c. b.